Preheat the oven to 375 degrees. Oil a 9 inch circular metal baking pan.
Reserve 1 ½ - 1 ¾ cup uncooked sweet potato pie filling (what you don’t use in the sweet potato pie). Add the uncooked pie filling to a medium size mixing bowl.
Add the canola oil, heavy cream, sugar, nutmeg, cinnamon, baking soda, and baking powder to the pie filling. Mix everything together until smooth and incorporated.
Bake the cake
Pour the cake batter into the oiled 9 inch round metal cake pan. Bake the cake at 375 degrees for 20 minutes, until the top is set and a toothpick inserted in the middle comes out clean.
Serve and enjoy
Let the cake cool for at least 15 minutes before slicing. Serve alone, or with whipped cream.
Notes
This cake is vegetarian.The texture of this cake is a cross between clafouti and butter cake.Serve this cake for breakfast, brunch, or dessert.Frost the cake, if desired, with my spiced buttercream, just make one adjustment: substitute the pumpkin pie spice with 1/4 tsp nutmeg.This cake is best if eaten within 1-2 days.